Added Component to visualize the strength of the password at registration

[Csaern]

As a project I made a password strength component to visualize the strength of a password used to create an account for the galaxy server. The user gets feedback for his input at the registration site. I also added a button for password guidelines, to show users, what components they need to get a strong password.

How to test the changes?

(Select all options that apply)

• I've included appropriate automated tests.
• This is a refactoring of components with existing test coverage.
• Instructions for manual testing are as follows:
  1. [add testing steps and prerequisites here if you didn't write automated tests covering all your changes]

License

• I agree to license these and all my past contributions to the core galaxy codebase under the MIT license.